All I know is that a very small amount of dairy products is supposed to be ok, such as a tiny bit of cottage cheese. They are supposed to be lactose intolerant, therefore, it is difficult (if not impossible) for them to digest and that is why it can result in diarrhea. I've never given mine milk. I just prefer she drinks water. She gets a tiny bit of low-fat 1% cottage cheese occasionally. Hope this helps.